Скачать или смотреть Build a hacker news clone in 10 minutes with roo code

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okay, let's build a basic hacker news clone in about 10 minutes (or maybe a bit more with explanations!) using ror (ruby on rails). this will be a simplified version focusing on the core features: submitting links and displaying them. we'll assume you have ruby, rails, and a database (like postgresql or sqlite) set up.

*important considerations:*

*"10 minutes" is conceptual:* the actual coding can be quick. the time will mostly be spent on understanding the code and adapting it.
*minimal styling:* we'll focus on functionality. don't expect beautiful css in this quick example.
*error handling and security:* this will be a basic, bare-bones example. production-ready code needs robust error handling, security measures (like input validation and authentication), and more.
*database:* i will use sqlite since it's very simple for setting up a testing app

*step 1: project setup*

1. *create the rails app:*

open your terminal and run:



2. *create the `link` model:*

this will represent a news item/link.



this creates:

`app/models/link.rb`: the link model class.
`db/migrate/timestamp_create_links.rb`: the database migration to create the `links` table. this will look something like this:



`db/migrate/` folder: where your databases migration data will be
`app/models/`: where your model data will be

*step 2: define the `link` model (app/models/link.rb)*



*explanation:*

`validates :title, presence: true`: ensures that the `title` attribute is required.
`validates :url, presence: true, format: { with: uri::regexp(%w[http https]), message: "must be a valid url" }`: ensures that the `url` attribute is required and is a valid http or https url using a regular expression for validation.

*step 3: create the `links` controller*

this will handle creating, displaying, and managing the links.



this creates:

`app/controllers/links_controller.rb`: ...

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